@3D_Laser Here’s my vent setup. It’s fits right in my window.
That PCB is a PWM Speed Controller. Got it for like $10 shipped from China.
The fan and power supply I got on Amazon for cheap. The fan was less than $20.
How loud is this setup? I am looking to do something similar, but am not sure if those bilge fans are quiet enough to work in the space where my window is.